Which of the following statements is INCORRECT?
A Kusum buys some chocolates at the rate of ₹ 10 per chocolate. She also buys an equal number of candies at the rate of ₹ 5 per candy. She makes a 20% profit on chocolates and 8% profit on candies. At the end of the day, all chocolates and candies are sold out and her profit is ₹ 240. Therefore, Kusum buys 100 chocolates.
B A carpenter charged ₹ 2500 for making a bed. The cost of materials used is ₹ 1100 and the labour charges are ₹ 200/hr. So, the carpenter will work for 7 hours.
C On dividing ₹ 200 between A and B such that twice of A's share is less than 3 times B's share by 200. So, B's share is ₹ 120.
D Madhulika thought of a number, double it and added 20 to it. On dividing the resulting number by 25, she gets 4. Hence, the required number is 45.
Sunil recorded the lengths of his model cars (in cms). Which of the following shows the lengths in order from least to greatest?
A6.34 cm, 6.5 cm, 6.8 cm, 6.78 cm, 6.45 cm
B6.34 cm, 6.45 cm, 6.5 cm, 6.78 cm, 6.8 cm
C6.8 cm, 6.78 cm, 6.45 cm, 6.5 cm, 6.34 cm
D6.78 cm, 6.8 cm, 6.5 cm, 6.45 cm, 6.34 cm
A steamer goes downstream and covers the distance between two ports in 5 hours while it covers the same distance upstream in 6 hours. If the speed of the stream is 1 km/hr, find the speed of the steamer in still water.
A 12 km/hr
B 11 km/hr
C 13 km/hr
D 14 km/hr
explanation of this solution